Construction machine having a sand shield

ABSTRACT

The present disclosure presents an construction machine having a sand shield comprising: at least one drum mounted to a frame at a side thereof; a drum drive motor mounted to the frame and configured to transmit a driving force to rotate the drum; a stationary shield fixed to surround the outer surface of the drum drive motor; and a rotary shield configured to surround one side of the drum drive plate mounted on the side of the drum and cover a part of the stationary shield so as to receive the driving force from the drum drive motor to rotate the drum, whereby the rotary shield is rotated together with the drum drive plate when the drum drive plate is rotated.

TECHNICAL FIELD

The present disclosure relates to a construction machine, in particular, relates to a construction machine having a sand shield.

BACKGROUND ART

A construction machine, especially a soil compaction machines are usually used in harsh environments such as sand and mud. Sand, mud, and other small particles can adhere to the machine body during normal work conditions and can cause problems with the inner workings of a machine. In particular, foreign substances such as sand and mud can adhere to and are accumulated on the drum drive motor mounted on the machines body frame and the drum drive plate configured to receive a driving force used to rotate the drum. The foreign substances usually end up in the gaps located in the connecting area between the drum drive motor and the drum drive plate when the construction machine is continuously operated. Eventually, these foreign substances can infiltrate into a bearing or oil seals, leading to excessive wear and external leakage. In addition, corrosion often occurs on the surfaces of components. This problem causes the failure of the motor, resulting in the reduction of the lifespan of the driving unit including the motor. Further, the time spent for maintenance is increased along with extra costs for the replacement of the motor.

DISCLOSURE OF INVENTION Technical Problem

In order to prevent machine damage due to the infiltration of foreign substances in the machines bearing and oil seals, and to prevent premature surface corrosion, the present disclosure employs the following arrangement.

Solution to Problem

According to one aspect of the present disclosure, the present disclosure provides a construction machine having a sand shield including: at least one drum mounted to a frame at a side thereof; a drum drive motor mounted to the frame and configured to transmit a driving force to rotate the drum; a stationary shield fixed to surround the outer surface of the drum drive motor; and a rotary shield configured to surround one side of a drum drive plate mounted on a side of the drum and cover a part of the stationary shield so as to receive the driving force from the drum drive motor to rotate the drum, whereby the rotary shield being rotated together with the drum drive plate when the drum drive plate is rotated.

It is preferable that the stationary shield includes a first ring member having a predetermined width, and a first flange provided at the outer circumferential end of the first ring member in proximity to the drum drive plate in such a manner as to be extend outwardly and inwardly from the outer circumferential end of the first ring member by a predetermined length in radial and central directions of the first ring member, respectively.

It is also preferable that the rotary shield includes a second ring member having a predetermined width, and a second flange provided at the outer circumferential end of the second ring member in proximity to the drum drive motor in such a manner as to be extend outwardly and inwardly from the outer circumferential end of the second ring member by a predetermined length in radial and central directions of the second ring member, respectively.

It is also preferable that the rotary shield and/or the stationary shield is formed so as to be divided into two semi-circular segments relative to the axial direction of the motor, and the two divided semi-circular segments are coupled to each other by means of a fastening member.

It is also preferable that the inner diameter of the second flange of the rotary shield is smaller than the outer diameter of the first flange of the stationary shield, and is larger than an outer diameter of the first ring member of the stationary shield.

It is also preferable that the outer diameter of the first flange of the stationary shield is larger than the inner diameter of the second flange of the rotary shield, and is smaller than the inner diameter of the second ring member of the rotary shield.

It is also preferable that the gap defined between the second flange of the rotary shield and the first flange of the stationary shield has a width of approximately 5 mm in the axial direction.

It is also preferable that the gap defined between one end of the drum drive plate and the first flange of the stationary shield has a width of approximately 5 mm.

It is also preferable that a pad is provided on the inner surface of the first ring member of the stationary shield and/or an inner surface of the second ring member of the rotary shield.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates a perspective view of a compactor machine.

FIG. 2 illustrates a perspective view of a part of a compactor machine having a sand shield.

FIG. 3 illustrates an exploded perspective view of a part of a compactor machine having a sand shield according to FIG. 2.

FIG. 4 shows a cross-sectional view of a part of a compactor machine having a sand shield according to FIG. 2.

FIG. 5 shows a perspective view of a stationary shield of a sand shield according to FIG. 2.

FIG. 6 shows a perspective view of a rotary shield of a sand shield according to FIG. 2.

MODE FOR THE INVENTION

While this invention is illustrated and described in a preferred embodiment, the device may be produced in many different configurations, forms and materials. There is depicted in the drawings, and will hereinafter be described in detail, a preferred embodiment of the invention, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and the associated functional specifications for its construction and is not intended to limit the invention to the embodiment illustrated. Those skilled in the art will envision many other possible variations within the scope of the present invention.

Referring to FIGS. 1 to 6, the present disclosure describes a construction machine, particularly a soil compacting machine.

FIG. 1 shows a general compacting machine in its entirety.

The compacting machine includes a machine body 160 having a frame 110 mounted at the front side thereof. In addition, the compacting machine includes at least one drum 140 mounted to frame 110. A drum drive plate 150 is mounted on the side of drum 140. A drum drive motor 130 is mounted at one side of frame 110 to drive drum 140.

As shown in FIG. 2, drum drive motor 130 mounted at one side of frame 110 of machine 100 is securely fixed to frame 110 by means of a sub-frame 210. In addition, drum 140 receives a driving force from drum drive motor 130, i.e., as drum drive plate 150 connected to drum drive motor 130 is rotated, drum 140 rotates with drum drive plate 150 to compact the ground.

During the normal work of the machine, foreign substances such as soil, sand, and other small particles stick to and are accumulated on the surfaces of the drum drive motor and the drum drive plate connected to the drum drive motor. Thus, the present disclosure includes a sand shield 200 disposed between the drum drive motor and the drum drive plate to prevent the foreign substances from infiltrating on the connecting area between the drum drive motor and the drum drive plate.

As shown in FIG. 2, sand shield 200 includes a stationary shield 220 and a rotary shield 240. As shown in FIG. 5, stationary shield 220 includes a first ring member 222 and a first flange 224. The first ring member 222 is formed in a cylindrical shape and has a predetermined width. The first ring member 22 is fixedly mounted to the drum drive motor 130. In addition, the first flange 224 is provided at the outer circumferential end of the first ring member 222, i.e., at the outer circumferential end of the first ring member 222 in proximity to drum drive plate 150. The first flange 224 is formed in a hollow disk shape which extends outwardly and inwardly from the outer circumferential end of the first ring member 222 by a predetermined length in radial and central directions of the first ring member 222, respectively. Also, as shown in FIG. 6, rotary shield 240 includes a second ring member 242 and a second flange 244. The second ring member 242 is formed in a cylindrical shape and has a predetermined width. The second ring member 242 is fixedly mounted to drum drive plate 150 so that when drum drive plate 150 is rotated, the second ring member 242 is rotated together with drum drive plate 150. In addition, the second flange 244 is provided at the outer circumferential end of the second ring member 242, i.e., at the outer circumferential end of the second ring member 242 in proximity to drum drive motor 130. The second flange 244 is formed in a hollow disk shape which extends outwardly and inwardly from the outer circumferential end of the second ring member 242 by a predetermined length in both radial and central directions of the second ring member 242, respectively.

FIG. 3 shows an exploded perspective view of a part of a compacting machine having a sand shield according to FIG. 2, and FIG. 4 shows a cross-sectional view when viewed from a direction indicated by an arrow A in FIG. 2.

Referring to FIGS. 3 and 4, stationary shield 220 is coupled to a peripheral portion of the drive shaft of the motor. Then, the second ring member 242 and the second flange 244 of rotary shield 240 are coupled to cover a part of the stationary shield 220, i.e., the first flange 224 of the stationary shield 220 while maintaining a minimum gap between the first flange 224 and rotary shield 240.

As shown in FIG. 3, stationary shield 220 may be formed so as to be divided into two semi-circular segments, which can be coupled to each other using a fastening member such as a screw or similar fastening apparatus. In addition, similarly, rotary shield 240 may be formed so as to be divided into two semi-circular segments, which can be coupled to each other using a fastening member such as a screw or similar fastening apparatus. As such, the stationary shield member and/or the rotary shield member is divided into two semi-circular segments, which are coupled to each other from both sides of drum drive motor 130 or drum drive plate 150, so that the sand shield can be easily separated from or coupled to the machine. In this aspect, the sand shield can be easily installed and the machine can be put back into action quickly and easily. In addition, the sand shield is easily separated from the machine so that the sand shield is convenient to clean. Further, the sand shield is easily separated from the machine to maintain and repair the machine so that maintenance of the machine can be performed smoothly.

As shown in FIGS. 3 and 4, when stationary shield 220 is coupled to drum drive motor 130 mounted to frame 110, a pad 226 may further be provided on the inner surface of the first ring member 222 of stationary shield 220 to improve an adhesion force between stationary shield 220 and drum drive motor 130. Also a pad 246 may further be provided on the inner surface of the second ring member 222 of rotary shield 240 to improve an adhesion force of rotary shield 240 to drum drive plate 150. Pad 226 can be preferably made of rubber material.

In addition, the gap defined between the first flange 224 of stationary shield 220 and one end of drum drive plate 150 may be formed to have a minimum width in order to prevent the infiltration of foreign substances while maintaining a predetermined distance in the axial direction so that the movement of drum drive plate 150 is not interrupted by stationary shield 220 which is stopped. Preferably, a gap g1 defined between the first flange 224 of stationary shield 220 and one end of drum drive plate 150 is formed to have a width of approximately 5 mm.

Then, rotary shield 240 can be coupled to drum drive plate 150 such that the second ring member 242 and the second flange 244 of rotary shield 240 cover the first flange 222 of stationary shield 220 mounted to motor 130. Rotary shield 240 coupled to drum drive plate 150 is rotated together with drum drive plate 150 when drum drive plate 150 driven by drum drive motor 130 is rotated. In addition, the gap defined between the second flange 244 of rotary shield 240 and the first flange 224 of stationary shield 220 may be formed to have a minimum width to prevent the infiltration of foreign substances while maintaining a predetermined distance in the axial direction so that the movement of rotary shield 240 rotating together with drum drive plate 150 is not interrupted by stationary shield 220 which is stopped together with drum drive motor 130. Preferably, a gap g2 defined between the second flange 244 of rotary shield 240 and the first flange 224 of stationary shield 220 is formed to have a width of approximately 5 mm.

As shown in FIG. 4 through 6, the inner diameter d1 of the second flange 244 of rotary shield 240 is formed larger than the outer diameter D2 of the first ring member 222 of stationary shield 220 so that stationary shield 220 and rotary shield 240 are provided so as not to affect the rotation of rotary shield 240. Also, similarly, the inner diameter d2 of the second ring member 242 of rotary shield 240 is formed larger than the outer diameter D1 of the first flange 222 of stationary shield 220 so that stationary shield 220 and rotary shield 240 are provided so as not to affect the rotation of rotary shield 240. Besides, the inner diameter d1 of the second flange 244 of rotary shield 240 may be smaller than the outer diameter D1 of the first flange 222 of stationary shield 220. By virtue of this configuration, although foreign substances such as soil and other foreign materials can adhere to the machine and infiltrate into the gap defined between second flange 244 of rotary shield 240 and the first ring member 222 of stationary shield 220 along with the rotation of drum drive plate 150, the first flange 224 is positioned in a protruding manner vertically to the axial direction serves as a barrier to prevent foreign substances from infiltrating into the connecting area between drum drive motor 130 and drum drive plate 150.

As described above, the sand shield including the stationary shield and the rotary shield is easily installed on a construction machine, in particular a soil compactor so that foreign substances accumulated on the surfaces of the drum drive motor and the drum drive plate can be prevented from infiltrating into the drive shaft of the drum drive motor during normal operation. Thus, it is possible to prevent damage to a bearing, oil seals, or other components of the machine which may cause a failure of the motor.

The foregoing description of the embodiments of the invention has been presented for the purpose of illustration; it is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Persons skilled in the relevant art can appreciate that many modifications and variations are possible in light of the above teachings. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by the claims appended hereto. 

1. A construction machine having a sand shield comprising: at least one drum mounted to a frame at a side thereof; a drum drive motor mounted to the frame and configured to transmit a driving force to rotate said drum; a stationary shield fixed to surround the outer surface of said drum drive motor; and a rotary shield configured to surround one side of a drum drive plate mounted on a side of said drum and cover a part of said stationary shield so as to receive the driving force from said drum drive motor to rotate said drum, whereby said rotary shield is rotated together with said drum drive plate when said drum drive plate is rotated.
 2. A construction machine having a sand shield according to claim 1, wherein said stationary shield comprises a first ring member having a predetermined width, and a first flange provided at the outer circumferential end of said first ring member in proximity to said drum drive plate in such a manner as to extend outwardly and inwardly from the outer circumferential end of said first ring member by a predetermined length in radial and central directions of said first ring member, respectively, and said rotary shield comprises a second ring member having a predetermined width, and a second flange provided at the outer circumferential end of said second ring member in proximity to said drum drive motor in such a manner as to extend outwardly and inwardly from the outer circumferential end of said second ring member by a predetermined length in radial and central directions of said second ring member, respectively
 3. A construction machine having a sand shield according to claim 1, wherein said rotary shield and/or said stationary shield is formed so as to be divided into two semi-circular segments relative to the axial direction of the motor, and the two semi-circular segments are coupled to each other by means of a fastening member.
 4. A construction machine having a sand shield according to claim 2, wherein the inner diameter of said second flange of said rotary shield is smaller than the outer diameter of said first flange of said stationary shield, and is larger than the outer diameter of said first ring member of said stationary shield.
 5. A construction machine having a sand shield according to claim 2, wherein the outer diameter of said first flange of said stationary shield is larger than the inner diameter of said second flange of said rotary shield, and is smaller than the inner diameter of said second ring member of said rotary shield.
 6. A construction machine having a sand shield according to claim 2, wherein a gap defined between said second flange of said rotary shield and said first flange of said stationary shield has a width of approximately 5 mm in the axial direction.
 7. A construction machine having a sand shield according to claim 2, wherein a gap defined between one end of said drum drive plate and said first flange of said stationary shield has a width of approximately 5 mm.
 8. A construction machine having a sand shield according to claim 2, further comprising a pad provided on an inner surface of said first ring member of said stationary shield and/or an inner surface of said second ring member of said rotary shield. 